Vicki, one possibility might be Disney Cruise Line. Your daughter is the perfect age, and they do have activities for adults too! Carnival, especially on the newer ships, might also be a good bet, as they have a good kids' program called Camp Carnival - I'd recommend the 7-day cruises there. (Disney offers 3-, 4-, and 7-day cruises; the shorter ones can be booked in conjunction with a stay at Disney World the rest of the week.) Do you have a travel agent you work with? You might ask him/her for suggestions as well! If you have worked with the same agent for a while, they might be familiar with your preferences.
Karen